221701268 has 12 divisors (see below), whose sum is σ = 397440372. Its totient is φ = 108146880.

The previous prime is 221701261. The next prime is 221701273. The reversal of 221701268 is 862107122.

221701268 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4963984 + 216737284 = 2228^2 + 14722^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221701268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221701261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675755 + ... + 676082.

It is an arithmetic number, because the mean of its divisors is an integer number (33120031).

Almost surely, 2^221701268 is an apocalyptic number.

It is an amenable number.

221701268 is a deficient number, since it is larger than the sum of its proper divisors (175739104).

221701268 is a wasteful number, since it uses less digits than its factorization.

221701268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351882 (or 1351880 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 221701268 is about 14889.6362615075. The cubic root of 221701268 is about 605.2331756066.

The spelling of 221701268 in words is "two hundred twenty-one million, seven hundred one thousand, two hundred sixty-eight".